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Three kinematical methods to identify local galactic structures
dc.contributor.author | Cubarsí Morera, Rafael |
dc.contributor.author | Alcobé López, Santiago |
dc.contributor.author | Vidojevic, S. |
dc.contributor.author | Ninkovic, S. |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Matemàtica Aplicada IV |
dc.date.accessioned | 2011-02-22T17:31:44Z |
dc.date.available | 2011-02-22T17:31:44Z |
dc.date.created | 2010-05 |
dc.date.issued | 2010-05 |
dc.identifier.citation | Cubarsi, R. [et al.]. Three kinematical methods to identify local galactic structures. A: DYNAMICS AND EVOLUTION OF DISC GALAXIES. "27th Annual Pushchino Conference". Moscou: 2010. |
dc.identifier.uri | http://hdl.handle.net/2117/11488 |
dc.description.abstract | Method one: by combining a sampling parameter related to an isolating integral of the stellar motion, an optimisation of the mixture approach, and a maximisation of the partition entropy for the constituent populations of the stellar sample. Method two: by segregating into different kinematical components in terms of the stellar orbital parameters. Method three: by approaching a maximum entropy velocity distribution to samples selected in terms of stellar eccentricity layers. Working samples: HIPPARCOS and Geneva-Copenhagen survey catalog. Results: kinematical characterisation of large-scale structures, such as thin disc, thick disc and halo, and identification of small-scale structures, such as moving groups in the solar neighbourhood. Consequences: confirmation of the Titius-Bode-like law for radial velocity dispersions and explanation of the apparent vertex deviation of the disc from the swinging of two major kinematic groups around the LSR, by predicting a continuously changing orientation of the disc pseudo ellipsoid. |
dc.format.extent | 1 p. |
dc.language.iso | eng |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Spain |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
dc.subject | Àrees temàtiques de la UPC::Matemàtiques i estadística::Matemàtica aplicada a les ciències |
dc.subject.lcsh | Kinematics |
dc.subject.lcsh | Galaxies Motion in line of sight |
dc.subject.lcsh | Stars--Orbits |
dc.title | Three kinematical methods to identify local galactic structures |
dc.type | Conference lecture |
dc.subject.lemac | Cinemàtica |
dc.subject.lemac | Espectrometria |
dc.subject.lemac | Galàxies |
dc.contributor.group | Universitat Politècnica de Catalunya. gAGE - Grup d'Astronomia i Geomàtica |
dc.rights.access | Open Access |
local.identifier.drac | 2566470 |
dc.description.version | Postprint (published version) |
local.citation.author | Cubarsi, R.; Alcobe, S.; Vidojevic, S.; Ninkovic, S. |
local.citation.contributor | DYNAMICS AND EVOLUTION OF DISC GALAXIES |
local.citation.pubplace | Moscou |
local.citation.publicationName | 27th Annual Pushchino Conference |